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Wed, 19 Feb 2020 13:11:24 +0000 From: Oleksandr Suvorov To: "devicetree@vger.kernel.org" CC: Marcel Ziswiler , Igor Opanyuk , Philippe Schenker , Oleksandr Suvorov , Fabio Estevam , Mark Rutland , NXP Linux Team , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , Shawn Guo , Stefan Agner , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: [PATCH v2] ARM: dts: imx7-colibri: Fix frequency for sd/mmc Thread-Topic: [PATCH v2] ARM: dts: imx7-colibri: Fix frequency for sd/mmc Thread-Index: AQHV5yYW1MJ7wsEAJkO5IbqDZXMXGg== Date: Wed, 19 Feb 2020 13:11:24 +0000 Message-ID: <20200219131121.3565738-1-oleksandr.suvorov@toradex.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: PR0P264CA0152.FRAP264.PROD.OUTLOOK.COM (2603:10a6:100:1b::20) To VI1PR05MB3279.eurprd05.prod.outlook.com (2603:10a6:802:1c::24) authentication-results: spf=none (sender IP is ) smtp.mailfrom=oleksandr.suvorov@toradex.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.24.1 x-originating-ip: [194.105.145.90] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 264d84c1-21c1-452a-6cdb-08d7b53d38b7 x-ms-traffictypediagnostic: VI1PR05MB6112: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:3968; 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Removing the unnecessary max-frequency limit significantly increases the performance: == before fix ==== root@colibri-imx7-emmc:~# hdparm -t /dev/mmcblk0 /dev/mmcblk0: Timing buffered disk reads: 252 MB in 3.02 seconds = 83.54 MB/sec ================== === after fix ==== root@colibri-imx7-emmc:~# hdparm -t /dev/mmcblk0 /dev/mmcblk0: Timing buffered disk reads: 408 MB in 3.00 seconds = 135.94 MB/sec ================== Fixes: f928a4a377e4 ("ARM: dts: imx7: add Toradex Colibri iMX7D 1GB (eMMC) support") Signed-off-by: Oleksandr Suvorov Reviewed-by: Fabio Estevam --- Changes in v2: - keep the Fixes tag in the single line arch/arm/boot/dts/imx7-colibri.dtsi | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm/boot/dts/imx7-colibri.dtsi b/arch/arm/boot/dts/imx7-colibri.dtsi index d05be3f0e2a7..04717cf69db0 100644 --- a/arch/arm/boot/dts/imx7-colibri.dtsi +++ b/arch/arm/boot/dts/imx7-colibri.dtsi @@ -336,7 +336,6 @@ &usdhc3 { assigned-clock-rates = <400000000>; bus-width = <8>; fsl,tuning-step = <2>; - max-frequency = <100000000>; vmmc-supply = <®_module_3v3>; vqmmc-supply = <®_DCDC3>; non-removable;